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Thanks! After reading the patch description I have an extra question: If I use the patch, I still get to have a random MAC addr each time I reboot, but my IT team configured their DHCP server to provide me with an IP based on a stable MAC address... It seams MAC addresses are set random in many systems now that does not fit with what I learned about them ...in the 90's... How do I get a fixed IP with a random MAC?
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FafamanSep 28 '11 at 10:00

@Fafaman: If you follow the search link you'll find patches that allow setting a fixed MAC as part of the module parameters (and possibly on the fly?) - within the first few hits as well :). One patch even hardcodes a MAC address, if I saw correctly in the quick glances
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seheSep 28 '11 at 10:37